Наилучший подход к получению состояний детализации детализации => районы конгресса

Question

В настоящее время у меня есть карта, показывающая государственные полигоны для США. Я бы хотел бы иметь возможность дважды щелкнуть мышью по состоянию, а затем увеличить до состояние и конгрессный район (CD) полигонов.

У меня есть отдельные карты, отлично работающие с использованием kml. Я не уверен, что такое лучший подход для сверления с состояния на компакт-диск. Сложный бит: мне нужно имя/код состояния, как то, как я теперь создаю KML на уровне CD.

Я использую google maps api v3.

Answer 1

Возможно, я ошибаюсь, но вы хотите, чтобы иметь возможность дважды щелкнуть по точке на карте и узнать, какое состояние нажать? Затем увеличьте это состояние и отобразите карту компакт-диска?

Предполагая, что это так - сделайте reverse geocode в Google Maps при событии двойного щелчка. Из результирующих географических данных вы извлекаете состояние (вторая последняя информация в массиве результатов).

Пример ответ от документации Google:

results[0].formatted_address: "275-291 Bedford Ave, Brooklyn, NY 11211, USA", 
results[1].formatted_address: "Williamsburg, NY, USA", 
results[2].formatted_address: "New York 11211, USA", 
results[3].formatted_address: "Kings, New York, USA", 
results[4].formatted_address: "Brooklyn, New York, USA", 
results[5].formatted_address: "New York, New York, USA", 
results[6].formatted_address: "New York, USA", // The state information 
results[7].formatted_address: "United States" 

Если после этого вы хотели бы, чтобы увеличить до заданной состояния карты степени, вы можете либо определить свой собственный или использовать стандартное геокодирования, чтобы найти координаты для государства.

Answer 2

Вот изображение:

А вот источник:

<img class="map" src="/images/map_us_outline.png" width="550" height="375" usemap="#usa"> 
<map name="usa"> 
<area 
href="/state.php?state=Washington" title="WA" shape="poly" coords="27,3,27,13,27,28,26,34,33,35,34,42,56,47,77,50,88,49,96,12,48,1,49,12,41,10" /> 
<area shape="poly" coords="26,32,22,45,13,65,8,73,7,84,28,90,64,100,75,102,83,77,83,68,90,56,88,52,77,49,51,46,36,43,33,35" 
href="/state.php?state=Oregon" 
alt="Oregon" title="Oregon" /> 
<area shape="poly" coords="8,85,6,93,2,102,1,111,2,120,3,129,8,143,9,154,10,166,17,186,27,196,44,212,48,222,73,227,76,220,82,210,82,202,74,186,38,134,47,97" 
href="/state.php?state=California" 
alt="California" title="California" /> 
<area shape="poly" coords="96,13,88,50,91,57,82,68,82,76,75,101,133,113,137,79,126,78,118,71,115,61,110,62,111,57,113,50,103,29,104,15" 
href="/state.php?state=Idaho" 
alt="Idaho" title="Idaho" /> 
<area shape="poly" coords="48,97,38,134,81,201,81,188,83,182,89,182,105,109" 
href="/state.php?state=Nevada" 
alt="Nevada" title="Nevada" /> 
<area shape="poly" coords="105,109,93,172,142,182,149,128,129,125,133,113" 
href="/state.php?state=Utah" 
alt="Utah" title="Utah" /> 
<area shape="poly" coords="92,174,88,185,84,183,80,196,84,208,76,218,76,226,72,230,111,253,133,257,143,182" 
href="/state.php?state=Arizona" 
alt="Arizona" title="Arizona" /> 
<area shape="poly" coords="104,16,104,34,113,49,109,61,115,62,118,73,131,78,139,75,204,82,208,30" 
href="/state.php?state=Montana" 
alt="Montana" title="Montana" /> 
<area shape="poly" coords="140,75,132,125,198,134,204,83" 
href="/state.php?state=Wyoming" 
alt="Wyoming" title="Wyoming" /> 
<area shape="poly" coords="151,130,143,180,216,188,220,136" 
href="/state.php?state=Colorado" 
alt="Colorado" title="Colorado" /> 
<area shape="poly" coords="145,182,133,255,142,257,144,250,161,252,163,250,199,253,206,189" 
href="/state.php?state=New Mexico" 
alt="New Mexico" title="New Mexico" /> 
<area shape="poly" coords="208,30,206,68,274,72,267,32" 
href="/state.php?state=North Dakota" 
alt="North Dakota" title="North Dakota" /> 
<area shape="poly" coords="206,69,203,109,254,111,265,115,274,119,276,82,271,78,272,72" 
href="/state.php?state=South Dakota" 
alt="South Dakota" title="South Dakota" /> 
<area shape="poly" coords="202,109,200,134,218,138,219,150,287,152,282,143,274,117,265,114,259,113,250,110" 
href="/state.php?state=Nebraska" 
alt="Nebraska" title="Nebraska" /> 
<area shape="poly" coords="220,149,217,189,294,191,293,161,289,157,288,152,282,150" 
href="/state.php?state=Kansas" 
alt="Kansas" title="Kansas" /> 
<area shape="poly" coords="206,189,206,195,236,197,237,223,257,231,277,235,288,234,297,236,294,192,290,191" 
href="/state.php?state=Oklahoma" 
alt="Oklahoma" title="Oklahoma" /> 
<area shape="poly" coords="206,195,200,253,162,251,165,258,178,273,182,282,197,293,203,283,221,289,237,314,246,330,265,335,263,319,275,302,304,287,306,267,301,246,300,236,289,232,265,231,244,225,238,222,236,197" 
href="/state.php?state=Texas" 
alt="Texas" title="Texas" /> 
<area shape="poly" coords="269,33,274,70,272,77,275,84,276,107,324,103,324,96,313,88,308,79,310,70,318,56,336,44,323,41,311,38,296,36,290,29,285,30" 
href="/state.php?state=Minnesota" 
alt="Minnesota" title="Minnesota" /> 
<area shape="poly" coords="274,105,274,116,282,142,326,144,329,134,328,130,337,122,330,113,325,106,322,103" 
href="/state.php?state=Iowa" 
alt="Iowa" title="Iowa" /> 
<area shape="poly" coords="283,143,292,162,295,181,294,197,340,197,340,203,348,196,349,188,338,172,340,165,333,162,325,152,324,143" 
href="/state.php?state=Missouri" 
alt="Missouri" title="Missouri" /> 
<area shape="poly" coords="295,197,295,234,300,239,302,244,333,243,333,232,341,215,346,204,340,201,341,197,337,196" 
href="/state.php?state=Arkansas" 
alt="Arkansas" title="Arkansas" /> 
<area shape="poly" coords="301,243,304,261,307,270,302,287,321,287,327,284,341,291,349,289,360,292,356,287,357,280,352,278,349,269,329,266,335,249,332,241" 
href="/state.php?state=Louisiana" 
alt="Louisiana" title="Louisiana" /> 
<area shape="poly" coords="314,62,309,76,310,87,323,96,326,108,331,117,357,114,358,99,362,78,356,82,356,74,341,66,327,61,323,58" 
href="/state.php?state=Wisconsin" 
alt="Wisconsin" title="Wisconsin" /> 
<area shape="poly" coords="333,116,337,123,331,130,329,134,325,146,331,159,339,161,340,173,347,183,356,184,364,170,363,137,359,120,356,116" 
href="/state.php?state=Illinois" 
alt="Illinois" title="Illinois" /> 
<area shape="poly" coords="352,185,349,193,367,192,408,188,423,173,415,161,408,159,394,156,389,163,380,172,366,176,361,177" 
href="/state.php?state=Kentucky" 
alt="Kentucky" title="Kentucky" /> 
<area shape="poly" coords="349,194,342,214,400,211,408,201,422,194,429,184,373,191,364,191" 
href="/state.php?state=Tennessee" 
alt="Tennessee" title="Tennessee" /> 
<area shape="poly" coords="340,216,334,226,332,235,335,250,329,264,336,269,349,267,353,275,365,274,363,214" 
href="/state.php?state=Mississippi" 
alt="Mississippi" title="Mississippi" /> 
<area shape="poly" coords="364,213,363,255,365,273,377,274,373,266,402,263,403,244,391,212" 
href="/state.php?state=Alabama" 
alt="Alabama" title="Alabama" /> 
<area shape="poly" coords="391,211,402,244,404,263,438,266,439,260,446,242,423,216,413,207" 
href="/state.php?state=Georgia" 
alt="Georgia" title="Georgia" /> 
<area shape="poly" coords="374,266,378,273,390,273,397,277,407,278,418,275,430,280,432,298,444,316,459,328,470,328,469,310,458,283,449,268,442,260,435,260,433,264,422,264,404,265,399,261" 
href="/state.php?state=Florida" 
alt="Florida" title="Florida" /> 
<area shape="poly" coords="416,208,417,213,433,226,447,245,462,225,470,214,453,204,442,206,439,202,428,202" 
href="/state.php?state=South Carolina" 
alt="South Carolina" title="South Carolina" /> 
<area shape="poly" coords="428,185,415,197,402,205,407,209,424,204,439,202,456,205,471,215,487,202,492,185,488,175" 
href="/state.php?state=North Carolina" 
alt="North Carolina" title="North Carolina" /> 
<area shape="poly" coords="422,174,412,186,444,184,487,175,487,169,482,167,480,157,474,153,470,148,465,142,458,143,453,150,447,154,442,167,434,173" 
href="/state.php?state=Virginia" 
alt="Virginia" title="Virginia" /> 
<area shape="poly" coords="327,60,337,66,352,71,355,82,360,73,376,66,392,64,384,57,377,55,367,58,357,58,351,55,351,49,341,53" 
href="/state.php?state=Michigan" 
alt="Michigan" title="Michigan" /> 
<area shape="poly" coords="382,68,378,77,371,84,368,95,372,112,368,124,388,121,401,120,409,103,405,89,401,90,395,96,393,88,398,72" 
href="/state.php?state=Michigan" 
alt="Michigan" title="Michigan" /> 
<area shape="poly" coords="363,125,364,154,361,172,370,173,386,166,394,157,388,121" 
href="/state.php?state=Indiana" 
alt="Indiana" title="Indiana" /> 
<area shape="poly" coords="389,122,393,156,409,160,418,161,426,149,433,140,430,113,419,120,410,122,404,121,401,119" 
href="/state.php?state=Ohio" 
alt="Ohio" title="Ohio" /> 
<area shape="poly" coords="431,136,430,144,422,150,416,159,420,168,429,175,439,169,445,158,449,154,456,144,462,142,458,140,451,143,445,145,442,141,437,142" 
href="/state.php?state=West Virginia" 
alt="West Virginia" title="West Virginia" /> 
<area shape="poly" coords="430,112,434,141,486,131,489,125,484,119,486,107,479,102,455,108" 
href="/state.php?state=Pennsylvania" 
alt="Pennsylvania" title="Pennsylvania" /> 
<area shape="poly" coords="441,92,441,100,434,107,454,107,477,102,487,109,499,112,497,95,494,74,489,65,489,59,477,59,468,69,463,80,459,87" 
href="/state.php?state=New York" 
alt="New York" title="New York" /> 
<area shape="poly" coords="445,139,448,145,459,138,468,142,472,154,480,155,487,150,478,142,481,134,470,134" 
href="/state.php?state=Maryland" 
alt="Maryland" title="Maryland" /> 
<area shape="poly" coords="507,153,507,164,525,164,525,153" 
href="/state.php?state=Maryland" 
alt="Maryland" title="Maryland" /> 
<area shape="poly" coords="507,138,507,149,525,149,525,138" 
href="/state.php?state=Delaware" 
alt="Delaware" title="Delaware" /> 
<area shape="poly" coords="507,122,507,133,525,133,525,122" 
href="/state.php?state=New Jersey" 
alt="New Jersey" title="New Jersey" /> 
<area shape="poly" coords="520,108,520,119,538,119,538,108" 
href="/state.php?state=Connecticut" 
alt="Connecticut" title="Connecticut" /> 
<area shape="poly" coords="530,93,530,104,548,104,548,93" 
href="/state.php?state=Rhode Island" 
alt="Rhode Island" title="Rhode Island" /> 
<area shape="poly" coords="528,77,528,88,546,88,546,77" 
href="/state.php?state=Massachusetts" 
alt="Massachusetts" title="Massachusetts" /> 
<area shape="poly" coords="463,45,463,56,481,56,481,45" 
href="/state.php?state=Vermont" 
alt="Vermont" title="Vermont" /> 
<area shape="poly" coords="484,31,484,42,502,42,502,31" 
href="/state.php?state=New Hampshire" 
alt="New Hampshire" title="New Hampshire" /> 
<area shape="poly" coords="506,50,520,80,527,65,545,49,544,42,535,33,529,16,523,16,516,19,515,31,511,42" 
href="/state.php?state=Maine" 
alt="Maine" title="Maine" /> 
<area shape="poly" coords="52,249,42,253,37,260,31,265,32,270,39,276,39,285,32,281,22,282,26,292,37,294,39,302,30,305,27,313,28,324,39,329,48,337,43,348,33,356,21,360,7,364,12,369,33,362,48,353,59,343,68,333,78,327,85,321,105,321,131,332,147,344,158,340,154,329,141,324,130,316,114,312,107,303,99,271,92,253,84,250,66,250" 
href="/state.php?state=Alaska" 
alt="Alaska" title="Alaska" /> 
<area shape="poly" coords="147,290,145,298,153,297,165,300,170,308,185,312,187,323,197,331,207,325,201,316,192,306,184,299,171,294,161,288,151,288" 
href="/state.php?state=Hawaii" 
alt="Hawaii" title="Hawaii" /> 
<area shape="poly" coords="487,110,485,115,489,125,488,130,484,132,491,137,497,134,497,123,494,117" 
href="/state.php?state=New Jersey" 
alt="New Jersey" title="New Jersey" /> 
<area shape="poly" coords="490,59,492,73,497,86,502,80,504,63,504,55" 
href="/state.php?state=Vermont" 
alt="Vermont" title="Vermont" /> 
<area shape="poly" coords="506,51,505,61,503,74,502,86,513,83,519,80,512,67" 
href="/state.php?state=New Hampshire" 
alt="New Hampshire" title="New Hampshire" /> 
<area shape="poly" coords="497,88,498,97,516,93,524,95,529,91,522,87,519,83,511,83" 
href="/state.php?state=Massachusetts" 
alt="Massachusetts" title="Massachusetts" /> 
<area shape="rect" coords="548,373,550,375" 
href="http://www.image-maps.com/index.php?aff=mapped_users_812073229" 
alt="Image Map" title="Image Map" /> 
</map>